Battery charger



FIG. 1 is a front, top perspective view of a battery charger showing our new design;

FIG. 2 is a rear, bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The dash-dash broken lines throughout the drawing figures depict portions of the battery charger that form no part of the claimed design. The broken lines and unshaded surfaces bounded by broken lines form no part of the claimed design. 

CLAIM The ornamental design for a battery charger, as shown and described. 